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LICENSE

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+MIT License
+
+Copyright (c) 2025 Pigidiy
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the “Software”), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# ComfyUI-LikeSpiderAI-SaveMP3
+
+🎧 A custom ComfyUI node that saves input AUDIO as `.mp3` using `ffmpeg`.
+
+## Features
+
+- Saves `.mp3` to `output/audio/`
+- Selectable bitrate: 64 / 128 / 192 / 256 / 320 kbps
+- Works with any node that outputs `AUDIO`
+- No UI hacks or extra files
+
+## Requirements
+
+- Python ≥ 3.10
+- ffmpeg (must be installed and available in PATH)
+
+## Installation
+
+Clone this repository into your `ComfyUI/custom_nodes` directory:
+
+```bash
+cd ComfyUI/custom_nodes
+git clone https://github.com/Pigidiy/ComfyUI-LikeSpiderAI-SaveMP3.git

__init__.py

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+import os
+import subprocess
+import shutil
+from pathlib import Path
+import numpy as np
+import torch
+import folder_paths
+from scipy.io.wavfile import write
+
+class SaveAudioAsMP3:
+    @classmethod
+    def INPUT_TYPES(cls):
+        return {
+            "required": {
+                "audio": ("AUDIO",),
+                "bitrate_kbps": ([64, 128, 192, 256, 320], {"default": 192}),
+            }
+        }
+
+    RETURN_TYPES = ("AUDIO",)
+    RETURN_NAMES = ("audio",)
+    FUNCTION = "save_as_mp3"
+    OUTPUT_NODE = True
+    CATEGORY = "LikeSpiderAI"
+
+    def save_as_mp3(self, audio, bitrate_kbps):
+        if not shutil.which("ffmpeg"):
+            raise Exception("❌ ffmpeg not found. Please install and add to PATH.")
+
+        # Extract waveform
+        samples = audio["waveform"]
+        if isinstance(samples, torch.Tensor):
+            samples = samples.detach().cpu().numpy()
+        if samples.ndim == 3 and samples.shape[0] == 1:
+            samples = samples[0]
+
+        max_val = np.max(np.abs(samples))
+        if max_val > 1.0:
+            samples = samples / max_val
+        samples = np.clip(samples, -1.0, 1.0)
+        audio_int16 = (samples * 32767).astype(np.int16)
+
+        if audio_int16.ndim == 2 and audio_int16.shape[0] in [1, 2]:
+            wav_data = audio_int16.T
+        elif audio_int16.ndim == 1:
+            wav_data = audio_int16
+        else:
+            raise Exception(f"❌ Unsupported audio shape: {audio_int16.shape}")
+
+        # Save as .mp3 in output/audio
+        output_dir = Path(folder_paths.get_output_directory()) / "audio"
+        output_dir.mkdir(parents=True, exist_ok=True)
+        existing = sorted(output_dir.glob("audio_*.mp3"))
+        index = len(existing)
+        mp3_path = output_dir / f"audio_{index:05d}.mp3"
+
+        # Save .wav temporarily for ffmpeg conversion
+        temp_wav = output_dir / "temp_input.wav"
+        write(temp_wav, 44100, wav_data)
+
+        subprocess.run([
+            "ffmpeg", "-y", "-i", str(temp_wav),
+            "-codec:a", "libmp3lame", "-b:a", f"{bitrate_kbps}k",
+            str(mp3_path)
+        ], check=True)
+        os.remove(temp_wav)
+
+        print(f"[SaveAudioAsMP3] ✅ MP3 saved: {mp3_path}")
+
+        # Return original audio to enable UI preview (if possible)
+        return (audio,)
+
+NODE_CLASS_MAPPINGS = {
+    "SaveAudioAsMP3": SaveAudioAsMP3
+}
+
+NODE_DISPLAY_NAME_MAPPINGS = {
+    "SaveAudioAsMP3": "Save Audio As MP3"
+}

info.json

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+{
+  "name": "ComfyUI-LikeSpiderAI-SaveMP3",
+  "author": "Pigidiy",
+  "version": "1.0",
+  "description": "Save AUDIO to .mp3 in ComfyUI with bitrate selection and ffmpeg conversion.",
+  "python_version": ">=3.10"
+}